Calculate fertilizer doses, NPK requirements, tank mix compatibility and micronutrient corrections for Indian crops — free, instant results.
NPK Dose Calculator
Enter crop, area and soil test values to get recommended fertilizer quantities.
Water Soluble Fertilizer (WSF) Fertigation Calculator
Calculate stock solution concentration and injection rate for drip irrigation systems.
Tank Mix Compatibility Checker
Check if fertilizers, pesticides and micronutrients can be mixed in the same tank.
Micronutrient Deficiency Calculator
Select crop and symptoms to identify deficiency and get correction doses.
Agricultural Unit Converter
Convert between acres, hectares, bigha, guntha and calculate fertilizer quantities.
Enter values above
Frequently Asked Questions
How much fertilizer per acre for grapes? +
Grapes require: N 150–200 kg/ha, P 60–80 kg/ha, K 150–200 kg/ha per year. For drip fertigation: start with NPK 19:19:19 at 3–4 kg/acre/week during vegetative stage, switch to NPK 13:00:45 at 4–6 kg/acre/week during fruit development. Iron EDDHA 6% at 1.5 kg/acre soil application before bud break.
What is NPK 19:19:19 dose per acre? +
NPK 19:19:19 via drip: 2–4 kg/acre/week during vegetative stage. Foliar: 5–10g per litre water. The balanced ratio suits vegetative growth of all crops. For fruit crops, switch to high-K grades (13:00:45) after fruit set.
How to calculate Zinc sulphate dose per acre? +
Zinc Sulphate 33% soil application: 10–15 kg/acre once before sowing or at land preparation. For foliar correction: Zinc EDTA 12% at 0.5g/litre water. For drip: Zinc EDTA at 250–500g/acre every 15 days during vegetative stage.
Can I mix DAP and Urea in tank? +
DAP + Urea: Generally compatible for soil application but DO NOT mix concentrated solutions — apply separately for fertigation. Urea + DAP in water can cause ammonia release and pH spike. For fertigation, use water-soluble NPK grades instead of soil fertilizers.
What is 1 acre in hectare and guntha? +
1 Acre = 0.4047 Hectare = 40 Guntha = 4840 sq yards = 43,560 sq feet. Maharashtra uses Guntha (1 acre = 40 guntha). For fertilizer dosing: multiply per-hectare dose by 0.4047 to get per-acre dose.
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